1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Novosadov [1.4K]
4 years ago
14

A car is driven on a straight track such that its displacement from the starting point is given as x = t + 2t2. What is the aver

age velocity (average rate of change of displacement) of the car between t = 2s and t = 4s?
Mathematics
1 answer:
romanna [79]4 years ago
7 0
Average rate of change = (x(4) - x(2))/(4 - 2) = ((4 + 2(4)^2) - (2 + 2(2)^2))/2 = ((4 + 2(16)) - (2 + 2(4)))/2 = ((4 + 32) - (2 + 8))/2 = (36 - 10)/2 = 26/2 = 13.

Therefore, average velocity is 13 m/s
You might be interested in
What is the solution of 34x+2x=44
Alex

Answer:

x=11/9 hope this helped <3

Step-by-step explanation:

Let's solve your equation step-by-step.

34x+2x=44

Step 1: Simplify both sides of the equation.

34x+2x=44

(34x+2x)=44(Combine Like Terms)

36x=44

36x=44

Step 2: Divide both sides by 36.

8 0
3 years ago
Read 2 more answers
I'LL GIVE BRAINLIEST!<br> Simplify
monitta

(4ab^2-5ba-2ba^2+a^2+4b^3+a^3)(2b+a)/ a-4b^2

6 0
3 years ago
Three workers at a fast food restaurant pack the take-out chicken dinners. john packs 45% of the dinners, mary packs 25% of the
lyudmila [28]
To calculate this probability is often easier to calculate the complement
the prob that we are looking for is 1-P(No salt packed in dinner)
Note: No salt packed with dinner is the complement event of having salt packed within
so let's find this probability
He is what we know
if John packs 4/45 chance no salt included
if Sue packs 3/70 chance no salt
if Marry packs 2/25 No salt
We are looking into probability is the sum (note these events are disjoint)
final result should be 1- that sum
5 0
3 years ago
Read 2 more answers
You were given the polynomial f(x)=3x^3+13x^2+19x+k and you know that f(-2)=0find k
eduard

Answer:

k = 10

Explanation:

The initial polynomial is:

f(x)=3x^3+13x^2+19x+k

If f(-2) = 0, then when we replace x by -2, the result will be 0. It means that we can write the following equation:

\begin{gathered} f(-2)=3(-2)^3+13(-2)^2+19(-2)+k=0 \\ 3(-2)^3+13(-2)^2+19(-2)+k=0 \end{gathered}

Therefore, we can solve for k as follows:

\begin{gathered} 3(-8)+13(4)+19(-2)+k=0 \\ -24+52-38+k=0 \\ -10+k=0 \\ -10+k+10=0+10 \\ k=10 \end{gathered}

So, the value of k is 10

6 0
1 year ago
Find all real and complex solutions by completing the square.
Alisiya [41]
Y^2+4y=-8
add 8 both sides
y^2+4y+8=0 in the form of ax²+bx+c=0
Factor it
by formula
-b+-(√b²-4ac)/2a
-4+-(√16-32)/2*1
-4+-(√-16)/2
-4+-4i/2
-2+-2i where√-1=i


4 0
3 years ago
Other questions:
  • The two box plots summarize the number of hours spent in the weight room for all the players on the football team for two differ
    12·1 answer
  • I WILL MARK YOU BRAINLYEST IF YOU HELP ME AND YOU SHOW WORK!!!! FOR BOTH PARTS!!!
    12·1 answer
  • Simplify and express in exponential form: 8^-1 * 3^3/ 2^-4 * 9^-2
    15·2 answers
  • on a floor plan, a room measures 2 inches by 5 inches. if the scale is 1 inch = 4 feet, what is the actual size of the room?
    14·1 answer
  • In the cost function below, C(x) is the cost of producing x items. Find the average cost per item when the required number of it
    6·1 answer
  • In a right triangle the length of a hypotenuse is 6 and the length of one leg is 5. Find the length of the other leg,
    12·2 answers
  • How far will a car traveling at 65 miles per hour travel in 6 hours?
    14·1 answer
  • Compare and contrast the process for solving a linear equation (solving for x) without a calculator and graphing a linear equati
    14·1 answer
  • HELPPP FOR BRAINLEST PLEASE
    14·1 answer
  • One day, the weather report shows that boston is experiencing a temperature of -27 degrees, while london is experiencing a tempe
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!